fix: Default breadcrumbs value for events without breadcrumbs (#4952)

alexander-alderman-webb · web-flow · commit cc432a6f301c · 2025-10-17T14:30:30.000+02:00
Change the default value when annotating truncated breadcrumbs to a dictionary with the expected keys instead of an empty list. Closes #4951
diff --git a/sentry_sdk/client.py b/sentry_sdk/client.py
@@ -619,7 +619,8 @@ def _prepare_event(
             )
         if previous_total_breadcrumbs is not None:
             event["breadcrumbs"] = AnnotatedValue(
-                event.get("breadcrumbs", []), {"len": previous_total_breadcrumbs}
+                event.get("breadcrumbs", {"values": []}),
+                {"len": previous_total_breadcrumbs},
             )
 
         # Postprocess the event here so that annotated types do

Original file line number	Diff line number	Diff line change
`@@ -619,7 +619,8 @@ def _prepare_event(`
`619`	`619`	`)`
`620`	`620`	`if previous_total_breadcrumbs is not None:`
`621`	`621`	`event["breadcrumbs"] = AnnotatedValue(`
`622`		`- event.get("breadcrumbs", []), {"len": previous_total_breadcrumbs}`
	`622`	`+ event.get("breadcrumbs", {"values": []}),`
	`623`	`+ {"len": previous_total_breadcrumbs},`
`623`	`624`	`)`
`624`	`625`
`625`	`626`	`# Postprocess the event here so that annotated types do`